#region License block : MPL 1.1/GPL 2.0/LGPL 2.1
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the FreeCL.Net library.
 *
 * The Initial Developer of the Original Code is 
 *  Oleksii Prudkyi (Oleksii.Prudkyi@gmail.com).
 * Portions created by the Initial Developer are Copyright (C) 2007-2008
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */
#endregion

using System;
using System.Windows.Forms;
using System.Globalization;
using System.Collections.Generic;

namespace Translate
{
	/// <summary>
	/// Description of InputLanguageManager.
	/// </summary>
	public static class InputLanguageManager
	{
		public static void SetInputLanguage(Language language)
		{
			foreach(InputLanguage il in InputLanguage.InstalledInputLanguages)
			{
				if(IsLanguageSupported(il, language))
				{
					if(InputLanguage.CurrentInputLanguage.Equals(il))
					{
						previous = InputLanguage.CurrentInputLanguage;
						return;
					}
						
					previous = il;
					InputLanguage.CurrentInputLanguage = il;
					return;
				}
			}
			previous = InputLanguage.CurrentInputLanguage;
		}
		
		static InputLanguage previous = InputLanguage.CurrentInputLanguage;
		public static bool IsInputLanguageChanged
		{
			get
			{
				bool res = !InputLanguage.CurrentInputLanguage.Equals(previous);
				if(res)
					previous = InputLanguage.CurrentInputLanguage;
				return res;
			}
		}
		
		public static bool IsLanguageSupported(Language language)
		{
			return IsLanguageSupported(InputLanguage.CurrentInputLanguage, language);
		}
		
		public static bool IsLanguageSupported(InputLanguage inputLanguage, Language language)
		{
			if(inputLanguage == null)
				throw new ArgumentNullException("inputLanguage");
				
			// TODO: support of other languages
			if(inputLanguage.LayoutName == "Strange Ukrainian" || inputLanguage.LayoutName == "Srange Ukrainian 1.6")
			{
				return language == Language.Russian || language == Language.Ukrainian;
			}
			return LanguageHelper.IsLanguageSupported(inputLanguage.Culture, language);
		}
		
	}
}
